Question

The given alkyl halide $C{H_3}C{H_2}C{H_2}Cl$ is the structure of:
(A) $n -$ propyl chloride
(B) $1 -$ chloropropane
(C) $1 -$ bromopropane
(D) both A and B

Answer 1

We have given the structure of hydrocarbon compounds attached with halogen chlorine. To name the structure we will use basic steps of nomenclature of organic compounds. The structure has a common name as well as the IUPAC name.

Complete step by step answer
First, we will understand the nomenclature of organic compounds. Nomenclature is defined as the naming of organic compounds using the basic rules or norms given by IUPAC. IUPAC is the authority which stands for International Union of Pure and Applied Chemistry. Now we will use the basic steps of nomenclature of organic compounds to name the given organic compound $C{H_3}C{H_2}C{H_2}Cl$ . So, let’s start step by step.
-First, we will find the parent chain which has the maximum number of carbon atoms in the structure of the organic compound. This is also called ‘Parent-Rule’ or ‘Chain-Rule’. So here there is only one chain with three carbon atoms. The chain is $C{H_3}C{H_2}C{H_2} -$ .
-Now we will search for a functional group in an organic compound. So here, the group is $- Cl$ . The carbon atoms attached to the group are given the least possible preference. So the numbering will be $^3C{H_3}^2C{H_2}^1C{H_2} - Cl$ .
-Now for three carbon atoms, we use propane, and chlorine is attached with the first carbon atom so the IUPAC name will be $1 -$ chloropropane.
-The common name of the structure is $n -$ propyl chloride.
-Therefore, $C{H_3}C{H_2}C{H_2}Cl$ is the structure of $1 -$ chloropropane and is $n -$ propyl chloride.
Therefore the correct option is (D).

Note:
Common name is the nomenclature system useful for naming simple organic molecules. It fails for complex molecules. The prefix $n -$ is used when all carbon forms a continuous linear chain or unbranched chain.